KR960018621A - Optically anisotropic film, manufacturing method thereof and liquid crystal display device - Google Patents

Optically anisotropic film, manufacturing method thereof and liquid crystal display device Download PDF

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KR960018621A
KR960018621A KR1019950040389A KR19950040389A KR960018621A KR 960018621 A KR960018621 A KR 960018621A KR 1019950040389 A KR1019950040389 A KR 1019950040389A KR 19950040389 A KR19950040389 A KR 19950040389A KR 960018621 A KR960018621 A KR 960018621A
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optically anisotropic
anisotropic film
liquid crystal
polymer
retardation
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KR1019950040389A
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KR100390599B1 (en
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도시히로 오니시
다카노부 노구치
미치타카 모리카와
마사토 구와바라
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고사이 아키오
스미토모카가쿠고교 가부시키가이샤
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Priority claimed from JP7083920A external-priority patent/JPH08278410A/en
Priority claimed from JP7083921A external-priority patent/JPH08278406A/en
Priority claimed from JP17469695A external-priority patent/JP3610403B2/en
Application filed by 고사이 아키오, 스미토모카가쿠고교 가부시키가이샤 filed Critical 고사이 아키오
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/13363—Birefringent elements, e.g. for optical compensation
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3016—Polarising elements involving passive liquid crystal elements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/13363—Birefringent elements, e.g. for optical compensation
    • G02F1/133633—Birefringent elements, e.g. for optical compensation using mesogenic materials
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/13363—Birefringent elements, e.g. for optical compensation
    • G02F1/133637—Birefringent elements, e.g. for optical compensation characterised by the wavelength dispersion
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2203/00—Function characteristic
    • G02F2203/21—Thermal instability, i.e. DC drift, of an optical modulator; Arrangements or methods for the reduction thereof

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Polarising Elements (AREA)
  • Liquid Crystal (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Abstract

본 발명은 광학 이방체 필름의 80℃에서의 리타데이션이 30℃에서의 리타데이션의 20 내지 97%이며 광학 이방체 필름이 투명하거나 반투명한 고분자에 액정 혼합물이 혼합되어 이루어지고 액정 혼합물이 액정 화합물과 고분자의 중량 합계에 대해 0.5 내지 50중량%임을 특징으로 하는 광학 이방체 필름에 관한 것이다.In the present invention, the retardation of the optically anisotropic film at 80 ° C. is 20 to 97% of the retardation at 30 ° C., and the liquid crystal mixture is mixed with the liquid crystal compound and the polymer in which the optically anisotropic film is transparent or semitransparent. It relates to an optically anisotropic film, characterized in that 0.5 to 50% by weight relative to the total weight of.

본 발명의 광학 이방체 필름은 조합시켜 사용하는 액정 표시 셀의 특성에 맞춘 온도 변화율에 추가하여 삼차원 굴절을 구조나 파장 분사성을 가지므로 온도 보상효과를 나타내는 동시에 시야각 특성이나 고온에서의 표시 특성이 우수하다.The optically anisotropic film of the present invention has a three-dimensional refraction structure or wavelength jetting property in addition to the temperature change rate in accordance with the characteristics of the liquid crystal display cell used in combination, thereby exhibiting a temperature compensation effect and excellent display angle characteristics and display characteristics at high temperatures. Do.

Description

광학 이방체 필름, 이의 제조방법 및 액정 표시장치Optically anisotropic film, manufacturing method thereof and liquid crystal display device

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

Claims (17)

광학 이방체 필름의 80℃에서의 리타데이션이 30℃에서의 리타데이션의 20 내지 97%이며 광학 이방체 필름이 투명하거나 반투명한 고분자에 액정 혼합물이 혼합되어 이루어지고 액정 혼합물이 액정 화합물과 고분자의 중량 합계에 대해 0.5 내지 50중량%임을 특징으로 하는 광학 이방체 필름.The retardation of the optically anisotropic film at 80 ° C. is 20 to 97% of the retardation at 30 ° C., and the liquid crystal mixture is a mixture of a liquid crystal mixture and a polymer in which the optically anisotropic film is transparent or translucent, and the liquid crystal mixture is the sum of the weights of the liquid crystal compound and the polymer. 0.5 to 50% by weight relative to the optically anisotropic film. 광학 이방체 필름의 60℃에서의 리타데이션의 30℃에서의 리타데이션의 50 내지 99%이며 광학 이방체 필름이 투명하거나 반투명한 고분자에 액정 화합물이 혼합되어 이루어지고 액정 화합물이 액정 화합물과 고분자의 중량 합계에 대해 0.5 내지 50중량%임을 특징으로 하는 광학 이방체 필름.50 to 99% of the retardation at 30 ° C. of the retardation at 60 ° C. of the optically anisotropic film, wherein the liquid crystal compound is mixed with a transparent or semitransparent polymer and the liquid crystal compound is the sum of the weights of the liquid crystal compound and the polymer. 0.5 to 50% by weight relative to the optically anisotropic film. 제1항 또는 제2항에 있어서, 고분자의 유리 전이점이 80℃ 이상임을 특징으로 하는 광학 이방체 필름.The optically anisotropic film according to claim 1 or 2, wherein the glass transition point of the polymer is 80 ° C or higher. 제1항 내지 제3항 중의 어느 한 항에 있어서, 액정 화합물의 등방상 전이온도보다 20℃ 높은 온도에서 측정한 광학 이방체 필름의 리타데이션이 광학 이방체 필름의 30℃에서의 리타데이션의 80% 이하임을 특징으로 하는 광학 이방체 필름.The retardation of the optically anisotropic film measured at the temperature 20 degreeC higher than the isotropic transition temperature of a liquid crystal compound is 80% or less of the retardation in 30 degreeC of an optically anisotropic film in any one of Claims 1-3. An optically anisotropic film characterized in that. 제4항에 있어서, 고유 복굴절이 플러스(+)인 고분자와 마이너스(-)인 고분자를 사용함을 특징으로 하는 광학 이방체 필름.The optically anisotropic film according to claim 4, wherein a polymer having a positive birefringence of positive (+) and a polymer of negative (-) is used. 제1항 내지 제5항 중의 어느 한 항에 있어서, 광학 이방체 필름의 헤이즈가 10% 이하임을 특징으로 하는 광학 이방체 필름.The optically anisotropic film according to any one of claims 1 to 5, wherein the haze of the optically anisotropic film is 10% or less. 광학 이방체 필름의 30℃에서의 정면에서 측정한 리타데이션 값이 50nm 내지 3000nm이고 80℃에서의 리타데이션 값이 30℃에서의 리타데이션의 20 내지 97%인 동시에 30℃에서의 리타데이션 값의 비(R40＞R0)가 일반식(1)을 만족시킴을 특징으로 하는 광학 이방체 필름.The retardation value measured from the front side at 30 degreeC of an optically anisotropic film is 50 nm-3000 nm, and the retardation value at 80 degreeC is 20 to 97% of the retardation at 30 degreeC, and the ratio of retardation value at 30 degreeC (R 40> R 0) is optically anisotropic medium film, characterized by satisfying the formula (1). 0.900＜R40/R0＜1.100 (1)0.900 <R 40 / R 0 <1.100 (1) 상기식에서, R40및 R0은 세날몬 캄펜세이터를 장비한 편광 현미경에서 플러스(+)의 고유 복굴절성을 갖는 광학 이방체 필름의 경우에는 지연상 축을, 또한 마이너스(-)의 고유 복굴절성을 갖는 광학 이방체 필름의 경우에는 진행상 축방향을 각각 회전축으로 하여 광학 이방체 필름을 수평에서 40° 경사시킨 상태에서 측정한 리타데이션(R40)과 경사지지 않은 상태(수평상태)에서 측정한 리타데이션(R0)을 각각 나타낸다.In the above formula, R 40 and R 0 have a retardation axis and negative (-) intrinsic birefringence in the case of an optically anisotropic film having a positive intrinsic birefringence in a polarization microscope equipped with cinnamon campensator. In the case of an optically anisotropic film having a retardation (R 40 ) measured in a state in which the optically anisotropic film is inclined 40 ° from the horizontal with the axial direction in progress as a rotation axis, respectively, and a retardation measured in an unslanted state (horizontal state) ( R 0 ) are respectively shown. 제7항에 있어서, 투명하거나 반투명한 고분자에 액정 화합물이 혼합되어 이루어지고 액정 화합물이 고분자와 액정 화합물의 중량 합계에 대해 0.5 내지 50중량%임을 특징으로 하는 광학 이방체 필름.The optically anisotropic film according to claim 7, wherein the liquid crystal compound is mixed with a transparent or translucent polymer, and the liquid crystal compound is 0.5 to 50% by weight based on the total weight of the polymer and the liquid crystal compound. 광학 이방체 필름의 80℃에서의 리타데이션 값이 30℃에서의 리타데이션 값의 60 내지 97%인 동시에 일반식(2)의 α값이 1.06을 초과함을 특징으로 하는 광학 이방체 필름.An optically anisotropic film, wherein the retardation value at 80 ° C. of the optically anisotropic film is 60 to 97% of the retardation value at 30 ° C., while the α value of the general formula (2) exceeds 1.06. α = RF/RD(2)α = R F / R D (2) 상기식에서, RF는 수소의 F선(파장 486nm)으로 측정한 리타데이션 값이고, RD는 나트륨의 D선(파장 589nm)으로 측정한 리타데이션 값이다.In the above formula, R F is the retardation value measured by the F line (wavelength 486 nm) of hydrogen, and R D is the retardation value measured by the D line (wavelength 589 nm) of sodium. 제9항에 있어서, 광학 이방체 필름이 투명하거나 반투명한 고분자에 액정 화합물이 혼합되어 이루어지고 액정 화합물의 비율이 액정 화합물과 고분자의 중량 합계에 대해 0.5 내지 50중량%임을 특징으로 하는 광학 이방체 필름.The optically anisotropic film according to claim 9, wherein the optically anisotropic film is made by mixing a liquid crystal compound with a transparent or semitransparent polymer, and the ratio of the liquid crystal compound is 0.5 to 50% by weight based on the total weight of the liquid crystal compound and the polymer. 제10항에 있어서, 투명하거나 반투명한 고분자의 일반식(3)의 아베수(νD)가 31보다 작음을 특징으로 하는 광학 이방체 필름.The optically anisotropic film according to claim 10, wherein the Abbe's number (ν D ) of the general formula (3) of the transparent or translucent polymer is less than 31. νD= (nD-1)/(nF-nC) (3)ν D = (n D -1) / (n F -n C ) (3) 상기식에서, nC, nD및 nF는 각각 브라운 호퍼선의 C선(파장 656nm), D선(파장 589nm) 및 F선(파장 486nm)에 대한 굴절율이다.Wherein n C , n D and n F are the refractive indices for the C line (wavelength 656 nm), D line (wavelength 589 nm) and F line (wavelength 486 nm) of the Brown Hopper line, respectively. 제10항에 있어서, 액정 화합물을 단독으로 일축 배향시킨 경우에 나타내는 일반식(2)의 α값이 1.06을 초과함을 특징으로 하는 광학 이방체 필름.11. The optically anisotropic film according to claim 10, wherein the α value of the general formula (2) represented when the liquid crystal compound is uniaxially oriented alone exceeds 1.06. 아베수(νD)가 31보다 작은 고분자를 일축 연신하여 이루어진 광학 이방체 필름과 80℃에서의 리타데이션 값이 30℃에서의 리타데이션 값의 60 내지 97%인 광학 이방체 필름이 적층되어 이루어진 복합 광학 이방체 필름.A composite optical film formed by laminating an optically anisotropic film formed by uniaxial stretching of a polymer having an Abbe number (ν D ) of less than 31 and an optically anisotropic film having a retardation value at 80 ° C. of 60 to 97% of the retardation value at 30 ° C. Anisotropic film. 고분자와 액정 화합물을 혼합하여 필름으로 성형한 다음, 필름을 가열하면서 일축 연신함을 특징으로 하는, 제1항 내지 제6항 내지 제12항 중의 어느 한 항에 따르는 광학 이방체 필름의 제조방법.A method for producing an optically anisotropic film according to any one of claims 1 to 6, wherein the polymer and the liquid crystal compound are mixed to form a film and then uniaxially stretched while the film is heated. 제7항 또는 제8항에 있어서, 고분자와 액정 혼합물을 혼합하여 필름으로 성형한 다음, 성형체 필름에 연신 및 두께 방향의 배향을 증가시키는 처리를 실시함을 특징으로 하는, 광학 이방체 필름의 제조방법.The method for producing an optically anisotropic film according to claim 7 or 8, wherein the polymer and the liquid crystal mixture are mixed and molded into a film, and then the molded film is subjected to a treatment for increasing the stretching and the orientation in the thickness direction. . 제13항에 있어서, 아베수(νD)가 31보다 작은 고분자 필름과 고분자와 액정 화합물이 혼합되어 이루어진 필름을 적층한 다음, 적층 필름을 일축 연신함을 특징으로 하는, 복합 광학 이방체 필름의 제조방법.The method for manufacturing a composite optically anisotropic film according to claim 13, wherein a polymer film having an Abbe's number (ν D ) of less than 31 and a polymer and a liquid crystal compound are laminated, followed by uniaxial stretching of the laminated film. Way. 제1항 내지 제12항 및 제14항 중의 어느 한 항에 따르는 광학 이방체 필름을 사용하는 액정 표시장치.A liquid crystal display device using the optically anisotropic film according to any one of claims 1 to 12 and 14. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950040389A 1994-11-10 1995-11-09 An optical anisotropic film, the process for preparing the same and the liquid crystal display device KR100390599B1 (en)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
JP27657094 1994-11-10
JP94-276570 1994-11-10
JP95-083920 1995-04-10
JP7083920A JPH08278410A (en) 1995-04-10 1995-04-10 Optically anisotropic film, its production and liquid crystal display device
JP95-083921 1995-04-10
JP7083921A JPH08278406A (en) 1995-04-10 1995-04-10 Optically anisotropic film, its production and liquid crystal display device
JP95-174696 1995-07-11
JP17469695A JP3610403B2 (en) 1994-11-10 1995-07-11 Optical anisotropic film, method for manufacturing the same, and liquid crystal display device

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KR960018621A true KR960018621A (en) 1996-06-17
KR100390599B1 KR100390599B1 (en) 2003-09-13

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EP0712013B1 (en) 2006-02-08
TW327208B (en) 1998-02-21
EP0712013A2 (en) 1996-05-15
EP1329748A3 (en) 2005-02-02
US5736066A (en) 1998-04-07
KR100390599B1 (en) 2003-09-13
DE69534771D1 (en) 2006-04-20
DE69534771T2 (en) 2006-09-21
EP1329748A2 (en) 2003-07-23
EP0712013A3 (en) 1997-03-19

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